Method of making rings and the like



A. S. GAMPBELL.

METHOD OF MAKiNG RINGS AND THE LIKE.

APPLICATION FILED APR. 6. I921.

Patented Aug. 15, 1922. Q

fligvhonso S. 0 115635.

. Un ts stares fa rrionso s CAMPBELL, or weer iunnronn, nr'rissacirasn rrsg assrenoa TO A. s.

term

CAMPBELL COMPANY, or nosron, massacriusn'r rs; A corvrona'rron or MASSA onuns'rrs.

Application filed April 6,

T0 aZZ whom it may concern Be it known thatI, ALrrioNso S. CAM?- BELL, a citizen of the United States, and resident of West Medford, in the county of Middlesex, State of Massachusetts, have invented an Improvement in Methods of Making Rings and the like, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention pertains to improvements in methods of making rings and the like from sheet metal. It is among the objects of the invention to provide a method whereby rings and the like may be formed from relatively thin sheet metal, while minimizing the trouble and loss of material arising from operations during manufacture of the article.

I have found my new method peculiarly useful in connection with the manufacture of relatively large rings such as are used as portions of the frames of curtain windows.

In the drawings which show a preferred. embodiment of one form of my invention as applied to the manufacture of parts of ourtain window frames I Figure 1 is a front elevation of a portion of a curtain window frame in process of manufacture; I a

Fig. 2 is a rear elevation thereof;

Fig. 1

Fig. 4 shows sections of the parts shown in Fig. 3 prior to assembly; and

Fig. 5 is a section of acompleted ring. Referring to the drawings and to the preferred form of my invention selected for illustrative purposes, I have shown in Fig. 5

a section of a completed ring including the outer ring part 6, stifiened by a'stiifening element 7. In practising the preferred form of my improved method, I initially stamp on a piece of sheet metal the desired ring, while leaving the center portion of the metal to stiffen the ring. In Fig. 4, is shown a cross-section of the ring6 having the center portion 8 left as a stiffening member. The ring 6 is preferably, as indicated, convex on one side and concave on the other. The stifiening element 7 may be of any suitable form, but is preferably, as illustrated, formed from sheet metal distorted by stamping or the like to provide a relatively stifi crosssection, such as the right-angle cross-section i Specification of METHOD or MAKING nines'ann 'rnn LIKE.

LettcisBat ent. Patented Aug 15, 1922.. 1321.. Serial nor-459,115,

illustrated in the drawings. This reinforce ing part preferably fits. into the concave re cessed side of the ring and maybe attached to the ring in any suitable way, but'preferably, as illustrated, by spinning or dieing overthe peripheral portion of the ring Gas indicated at 9. If desired, the ring may be buffed, holes tapped in the reinforcing element, or any other desired operation performed while the stiffening element 8 is still in place. The stiffening, element 8 may then be punched out, leaving the ring 6 reinforced by the stiffening element 7, of sufiicient strength to withstand subsequent operations, if any. If, as in the ordinary course of'manufacture, the metal 8 in the center portion of the ring were stamped out as a part of the initial operation of forming the ring 6,"great difficulty would be encountered in properly assembling the ring 6 and the stiffening member 7, this arising from the inherent flexibility and lightness of the ring 6.

WW f

Whereas in the case of a curtain window,

the stiffening element 7 performs additional functions and 1t 18 deslrable tohave holes punched therethrough; these holes may be punched prior'to assembly with the other portions of the ring.

While I have illustrated a preferred prod.

not made by my improved method,- and while 1 have described a preferred method of practising my invention, it will be understood that considerable changes may bemade withoutdeparting from the scope of my in-. vention, which is best defined in the following claims. ,1

Claims.

1. The method of makingrings and the like from" sheet metal, which comprises stamping on the sheet the desired ring while leaving the center, portion of the metal to stiffen the ring, reinforcing the ring by as seinbling therewith a stiffening member and 2. The method ofmaking rings and the subsequently removing the center portion,

like from sheet metal, which comprises stamping on the sheet the desired ring While leaving the center portion of the'metal to stiffen the ring, reinforcing the ring by assembling therewith .a stiffening memb er by distorting the margin of the ring to overlie the stiffening "member and subsequently're- 'moving the center portion. i p v 8. The method of making rings and the like from sheet metal, which comprises stamping on the sheet the desired ring, said ring concave on one face and convex on the other, While leaving the center portion of the metal to stiffen the ring, reinforcing the ring by assembling therewith on the concave side a stiffening member and subsequently removing the center portion. 1

4C. The method of making rings and the like from sheet metal, Which comprises stamping on the sheet the desired ring, said 10 ring concave on one face and convex on the other, While leaving the center portion of the metal to stiffen the ring, reinforcing the rim" by assembling therewith on' the concave sir e stiffening member by distorting the mur 'n of the ring to overlie the stiifening member and subsequently removing the center portion.

In testimony whereof, I have signed my name to this specification,

ALPHUNSO S. CAMPBELL. 

